Evolution of an estuarine valley to barrier-lagoon system promoted by tidal prism change during a transgressive event (Lower Permian, Paraná Basin)
نویسندگان
چکیده
In modern marine marginal environments, the coastal morphology directly influences tidal and wave processes. this paper we present an example of ancient zone where change in controlled range. This study focuses on Permian Rio Bonito Formation southern Paraná Basin, major coal deposits South America are located. Sedimentological stratigraphical approaches were applied to cores drilled Candiota paleovalley area. We describe stratigraphic architecture a transgressive event Lower (Rio Formation). Two third order depositional sequences identified, which show differences paleoenvironmental record. lower sequence, associated with infilling incised valley, facies related fluvial currents dominant. micro-tidal inner sea context, range is amplified funnel-shaped valley. upper already evolving linear conditions, evidence processes almost disappear, sedimentation becomes dominated by processes, thus barrier system lagoons swamps established. Our study, besides detailing evolution sedimentary also provides for better understanding origin Brazil coal.
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ژورنال
عنوان ژورنال: Journal of South American Earth Sciences
سال: 2021
ISSN: ['0895-9811', '1873-0647']
DOI: https://doi.org/10.1016/j.jsames.2021.103398